| HB | health board; heart block; heel to buttock; held back; hemoglobin; hepatitis B; His bundle; hold bre... |
|---|---|
| HBB | hemoglobin beta-chain; hospital blood bank; hydroxybenzyl benzimidazole |
| HSDB | hazardous substances data bank |
| HTB | house tube feeding; human tumor bank |
| NPDB | National Practitioner Data Bank |